The special DLC chapter of Ace Attorney: Dual Destinies called "Turnabout Return", will be available in the west! This special chapter takes place between between Apollo Justice and this game.
Aside from this DLC, the DLC for new costumes for Phoenix, Apollo and Athena will also be available in the west. Sadly, the quiz DLC will not be available in the west. A Capcom representative revealed the reason why it's not available in the west. He said, "Unfortunately, the quiz DLC won't be coming to western territories since it requires an in-depth knowledge of Japanese culture."
Source: Siliconera
Aside from this DLC, the DLC for new costumes for Phoenix, Apollo and Athena will also be available in the west. Sadly, the quiz DLC will not be available in the west. A Capcom representative revealed the reason why it's not available in the west. He said, "Unfortunately, the quiz DLC won't be coming to western territories since it requires an in-depth knowledge of Japanese culture."
Source: Siliconera